UpdraftBackup Plus ia very good idea and apparently well executed. Thanks for your work. I have noticed that the FTP password isn't masked in the settings page and thus is visible at any time to all admins and others with Settings access. Otherwise the plug-in appears to work well.

Password-masking only prevents over-the-shoulder-snoopers. Admins and others with settings access aren't prevented in any way by how the password is or isn't displayed in the settings page. Just 'view source' of any page with a "masked" password field to see what I mean.